INDYCAR
• What: SunTrust Indy Challenge
• When: 8 p.m. Saturday on Versus
• Where: Richmond International Raceway, Richmond, Va.
• Defending winner: Tony Kanaan
• Who to watch: Dario Franchitti has finished out of the top seven in just one of the first seven races.

WORLD OF OUTLAWS
• What: World of Outlaws sprint car racing
• When: Friday night at U.S. 36 Raceway in Osborn, Mo., and Saturday night at Knoxville Raceway in Knoxville, Iowa. Audio is available at dirtvision.com.
• Defending winners: Jason Meyers (U.S. 36 Raceway), Donny Schatz (Knoxville)
• Who to watch: Joey Saldana has won two of the six races on three-eighth-mile tracks similar to U.S. 36 Raceway this season. Donny Schatz has won four of the past five races at Knoxville.